AB Quality GuardPLC 1800 Manuale di istruzioni per l'installazione - Pagina 8

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GuardPLC™ 1600 Controllers

Wiring the GuardPLC 1600

Preventing Electrostatic Discharge

ATTENTION

Grounding

The controller is grounded through its DIN rail connection and through a separate

grounding screw, located on the upper left of the housing and marked with the

grounding symbol

connection to earth ground as short as possible.

You must also provide an acceptable grounding path for each device in your

application. For more information on proper grounding guidelines, refer to the

Industrial Automation Wiring and Grounding Guidelines, publication number

1770-4.1.

Connecting the Voltage Supply

The 24V dc voltage supply must feature galvanic isolation (in accordance with

EN 60950 or UL 1950) since inputs and outputs are not electrically isolated from the

processor. It must also meet the requirements of the Safety Extra Low Voltage

(SELV – EN 60950) and Protective Extra Low Voltage (PELV – EN 60204) guidelines.

IMPORTANT

Publication 1753-IN001B-EN-P - March 2004

Electrostatic discharge can damage integrated circuits or

semiconductors. Follow these guidelines when you handle the

module:

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• If available, use a static-safe workstation.

• When not in use, keep the GuardPLC controller in its

static-shield box.

. To improve EMC conditions, ground the housing. Keep

Protect the controller with a slow-blowing fuse.

The GuardPLC 1600 can draw up to 8A. 0.5A is needed to operate

the controllers. Up to 7.5A can be used to source voltage power

for inputs and outputs connected to the 1600.